Integral and Semi-Integral Bridges

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The typical jointed highway bridge consists of single- and multiple-span bridges with movable roadway joints. Such jointed bridges, in one form or another, have been constructed for centuries. Unfortunately, due to the present demand for dry highway pavements throughout the winter seasons and the consequent use of deicing chemicals, jointed highway bridges have been exposed to serious metal corrosion and concrete deterioration. This durability problem has been so severe that integral bridges are becoming very popular alternatives. Unfortunately, although the elimination of bridge roadway joints solves bridge durability problems, it significantly increases the structural and analysis complexity since bridge superstructures are no longer as free to respond to superimposed loadings and environmental changes. Integral and Semi-Integral Bridges describes these complexities and shows how they can be minimized to the extent that the great majority of existing jointed bridges can be either replaced with integral bridges or modified with the semi-integral bridge concept. At present, there is little guidance and few design specifications or codes that govern the design and construction of integral bridges. Consequently, the recommendations provided in this book suggest methods that can be used to produce suitable bridges for various application situations.